Hose-clamp.



T. A. BOOR.

HOSE CLAMP.

APPLlCATlON FILED OCT. 19, 1916.

Patented Aug. 28, 1917.

WITNESSES ATTORNEYS THEODORE A. BOOK, OF ASHVILLE, OHIO.

HOSE-CLAMP.

Original application filed December 15, 1914, Serial No. 877,336.Divided Specification of Lettt. s Patent.

Patented Aug. 28, 11917.. and this application filed October 19, 1916.Serial No. 126,498.

To all whom it may concern:

Be it known that I, THEODORE A. BOOK, a citizen of the United States,and a resident of Ashville, in the county of Pickaway and State of Ohio,have invented a certain new and useful Improvement in Hose-Clamps, ofwhich the following is aspecification.

One of the principal objects of my present invention is to provide animproved clamp more especially designed for securing a hose sectionabout the adjacent ends of the pipe segments connecting an automobileengine with its radiator.

Another object ofthe invention is to provide an improved hose clamp inthe nature of a spring-band clamping around the rubber hose on theoutside of the same and resiliently retaining this hose against the pipesegments in such manner as to expand and contract with the metallicpipes, as the latter expand and contract, whereby to at all timessecurely retainthe hose against the pipes so that a water tight joint iscontinuously maintained, and without the disadvantage of mashing thehose out flat against the metallic pipes, as is often the case with theuse of hose clamps, in which provision for the expansion or contractionof the clamp with the metallic pipes has not been made.

With these and other objects in view, which will become apparent as thedescription proceeds, the invention resides in the construction,combinations, and arrangement of parts hereinafter more fully describedand claimed, and illustrated in the accompanying drawings, in which likecharacters represent like parts throughout the several figures, in whichFigure 1 represents a view in perspective of a portion of an automobileengineand its radiator, the clamp being shown in position securing thehose connection between the pipe segments.

Fig. 2 represents a view in section taken longitudinally through aportion of the hose connection constructed in accordance with myinvention;

Fig. 3 represents an elevational View of the hose clamp and theimplement usedin manipulating the same; and

Fig. 4 represents atop plan view of a mandrel on which indicating themethod of upon the hose section.

Referringmore particularly to the draw the clamp is assembled," placingthe clamp water cools off.

ing, an automobile engine is indicated generally at 5, and its radiatorat 6. The pipe leading from the water-jacket of the engine is indicatedat 7, and the pipe section connecting with the radiator is indicated at8. These pipe sections are connected together by means of the'rubberhose section 9, and this section is clamped upon the pipe section bymeans of clamps, indicated at 10 forming the subject of my invention.

The clamp consists of a helical uniform diameter and made of a singlelength of suitable spring wire or other desirable material, having anintegral hook 11 formed at one end, and a hook 12 formed at the otherend, the planes occupied by the spring of hooks being approximately atright angles to each other. When the clamps 10 are in pl'acevupon thehose section 9, they encircle the latter and resiliently retain it atall times in intimate contact with the external surfaces of the pipesections 7 and 8. It

is well known that the fluctuations in temperature of the water passingthrough the metallic pipe sections 7 and 8afiect the latter so that theyexpand as the water increases in temperature and contract as the Thuswhen the metal pipes 7 and 8 are hot, they are approximatelyonethirty-second of an inch larger than when they are cold.- In the oldstyle clamps, employing the use of a bolt or other device for tighteningthe band, the band being connected around the outside of the rubber hosesections, the heat of the water affects the pipe sections and results intheir expansion, but does not become transmitted to the metallic clampsthemselves, and therefore as the pipes expand, the rubber becomes mashedout at the sides of the clamps, and then when the pipes cool andcontract, remains spread or mashed out because of the fact that itbecomes slightly vulcanized by the heat of the pipes, and hence thepipes contract away from the rubber and the water-sealing joint betweenthe rubber hose and the pipe sections becomes broken and a leakagethrough the joints thus occurs. Applicants clamp, on the other hand,expands with the rubber, as the latter is increased in diameter by theexpanding pipes and does not mash or spread the rubber out because ofthe fact that when the clamp isin place upon the rubber section, theconvolutions of the clamps are slightly solid band and a hence the jointbetween the rubber and the metal never becomes broken but is alwaysretained tightly closed during the various degrees of expansion andcontraction of the pipes, and hence the joint does not leak.

A mandrel upon which the clamps are assembled and from which they aretransferred 'to therubber pipe section prior to placing the latter inposition for connecting the metallic. pipe sections is indicated inFig. 1. This mandrel includes a base 13, which may be secured to anysuitable support by means of a screw or other fastener 14, and atapering body 15 having a reduced neck portion 16 adjacent the base, anda tapered reduced outer end portion 17, over which, as indicated in Fig.4:, the end of the rubber hose section 9 fits. When the rubber hosesection is thus in place on the mandrel the outer surfaces substantiallymerge with the outer surfaces of the body 15- and the clamp 10 havingbeen hooked together at its ends around the reduced neck portion 16, isrolled up over the body 15, thus becoming expanded and is rolled on tothe rubber hose section 9. Two of the clamps are thus rolled up upon thesection 9 and rolled along a.

distance removed from the ends thereof and then the rubber hose sectionis fitted at its ends upon the ends of the metallic pipes 7 and 8,whereupon the clamps are again rolled toward, the ends of the rubbersections until they bind the same at desired points about the metallicpipes. It will thus be seen that when the clamps are placed upon thehose section they are under tension and hence they continuously tend tocontract about the rubber section and always retain the same tightlyclamped about the pipe sections. This ability of the clamps to beassembled upon the smaller portion of the mandrel without stretching theclamp, and then to be rolled up upon the rubber section over the largerportion of the mandrel, thus placing the band under tension renders theclamp exceedingly desirable and easy to properly assemble upon the hosesection. An advantage also presents itself in that the clamp may beshifted to assume a desired position on the hose section by simplyrolling the helical band along the hose section until it acquires theproper position thereon. In order that the ends of the spring band maybe readily disconnected when-it is desired to remove the clamp from thehose section, I provide a suitable hook,

..indicated at '18 having a handle portion 19.

When the clamp is to be removed, the hook 18 is engaged with the hookportion 12 formed on the band and the hook is pulled out of the hook 11,thus disconnecting the ends of the spring. 1

It will be noted that my invention provides a self-adjusting elasticband, capable of being rolled over the ends of the hose to force a bulgeon the inside thereof whereby to keep the surfaces of the metal tight,the said bands automatically operating to expand as the metallic pipesexpand and to contract as they contract whereby to, at all times,maintain a tight joint between the rubber section and the pipes.

Although I have described the preferred embodiment of my invention, Imay desire to make such changes in the construction, combination andarrangement of parts, as do not depart from the spirit of the inventionand the scope of the appended claim.

The clamp disclosed in this application is shown and described, but notclaimed, in my separate application Serial No. 877,336, filed December15, 1914., allowed August 18, 1916, and issued April 2 1,. 1917, PatentNo. 1,224,062.

I claim:

The combination of a metal pipe, a re.-

silient hose section encircling the metal pipe, and a resilient helicalspring encircling the hose section and detachably connected together atits ends, the said helical spring being under tension and having itsconvolutions separated whereby to expand and contract with the metallicpipe and maintain ,100

uniform pressure upon the resilient hose.

THEODORE A. BOOB.

